Four firefighters were injured, one of them critically, when a high-voltage power line electrified a ladder truck they were using to dump water on a group of college students doing the Ice Bucket Challenge.

While the challenge normally involves one person doused in ice water, the Campbellsville University marching band decided to go big, huddling as a group and getting the local fire department to douse them at once from the truck’s extended ladder.

But just after the stunt, the truck got too close to a power line.

Electricity surged through metal vehicle, injuring four firemen. Captain Tony Grider, 41, who was in the ladder bucket, suffered severe burns and is in critical condition. A second firefighter, who was also in the bucket, is in fair condition. Two others suffered lesser injuries.

Above, watch a report on the incident. Below, watch the police press conference.